Automobile-radiator cooling-tube.



E. & H. BEHR'INGER. AUTOMOBILE RADIATOR COOLING TUBE.

APPLICATION FILED APR. 13, 1911).

Patentpd Apr. 18, 1911.

wvawliom Ernll F .ll dllll ahringcr chrmscr gations with pointed or tenard one side;

' form of blank or FJVIII. I'lFl tING'ER AND HERD/IAN BEHRINGEB, OF BROOKLYN, NEW YORK.

AUTDMOIBILE--RADIATOR COOLING-TUBE.

3 invention.

.Tn the said drawings which hereby are made a part of this specification: Figure 1, is a sectional plan view of a group of three tubes embodying our invention, the section of the left hand tube being taken on the line a--'a of Fig. 4:, the middle section on the line ?)b and. the right hand tube section with line 0 of the samefigu're. Fig. 2 is a side having central corruapproximately diamoud shaped ends. Fig. 3 is a similar View of a modification in which the corrugations are provided with -heveled.or triangular shaped ends.

view showing a tube V Fig. 4: is a composite view wherein the left hand tube/As a section taken on the line d-d of Fig. '1, the middle tube is,

a section taken on the line e e of the same figure andthe right hand tube is shown as a full front view'of the corresponding tube of F 1. Fig. 5'is a fragmentary perspective view of the form of hown in Fig. 2. Fig. 6 is asiinilar-view f the modified form of tube shown. in Fig. Fig. 7 is a front view of, a. pair oftube's with the seam. ofi'set Fig. 8 is a rear view of a pair of cooling tubesshowing the twisted or chain like folds onth'bfack where the metal is criiup'ed .to tacil'tatefthe folding operations. Fig. .9 is. aftop plan view of one .Fig. 10 is a tube sheet. longitudinal section'taken on the line 10-10 of Fig. 9. Fig. 'll islairaginentary sectional View of a modified form of tube composed oftwo;pieces ot 'inaterial united by single seams anther-m gma back, and Fig. 12 is a fragmentar sideview thereof.

Our invention'relates specifically to certain novel features injth'e construction of Specification of Letters Patent.

Application filed April 13, 1910.

15 denotes a sheet metal blank Patented A.l)1.18,,1911.

Serial no. 555,276.

cooling tubes especially designed for automobile radiators.

in cooling apparatus of the class to which our invention particularly a pperteins, to se cure the best practical. results it is essential. in the first place to utilize comparatively thin sheet metal in the construction of the tube or tubes so as to more efficiently provide for the rapid equalization of varying temperatures of the liquids, gases or vapors under treatment; secondly, it necessary that the cooling tube or tubes shall have suiiicient strength, stiffness and rigidity to resist. the normal internal they may be subjected; and also the external strains due. primarily, to the shocks, jars and concussions inherent in machine; thirdly, it is desirable that all joints be made absolutely tight, and finally,

pressure to p which a rapidly moving" it is essentially necessary to provide for economy of manufacture.

Our invention is particularly designed to secure the advantageous results just recited and to these ends our invention consists, and its chief characteristics reside in making a cooling tube or tubes of that class defined above, out 01? comparatively thin sheet metal having two series of differently configurated angular corrugations offset relatively to one another and adapted to be brought together in parallelism to term a tube or tubes. The edges of the metal sheet projecting beyond. the corrugations plete closure and tight'joint for each tube. The internal flow of the fluidis intended to traverse the series of corrugations while the external low of the cooling medium would be parallel thereto.

Our invention as set forth in the subjoined claims includes within its scopeand purview the product or artcle of manufacture resulting from the practice of a certain method of manufacture, which is hereinafter fully dis closed, but claimed only in a separate patent.

ap lication.

ur invention arts, and combination of novel parts herematter described and pointed "out in the claims, noncludin this specification.

Referring to t e drawings,

(see-partied larly Figs. 9 and 10), and 16 a pluralitjof angular corrugations, preferably terminatare united to form a coIIi-' further imiludes the novelthe numeral i parallelism and at the .same time precludesubjected to the bending strain. In Figs. 1,

ing in sharp pointed or diamond shaped ends 17. As shown in Figs. 0 and 10,-thc sheet nietalfblank 1.5 is provided at a me dium line between the lo-ngitudii'ial corrugations 16 with a series of diagonal deflections 18, the functions of which are to facilitate the easy folding of the sheet -,nietal blank so as to bring 'the corrugations 16 in the liability of weakening ,the metal when 2, 3 and 8 are indicated a series of angularly disposed crimps 19 which result from the diagonal deflections 18. Then the corrugated sheet metal blank 15 is centrally bent and folded over, the said crimps or chain like folds 19 provide means for taking up the surplus metal in the folding operation. The free edges 20 of the blank 15 are brought together when the said blank" is folded and these .edges are interlocked as indicated by the dotted lines 21 of Fig. 9 or the full lines 22 ,of Fig. 1', to form aseam or joint of well known construction'inthe sheet metal workers art and as an additional precaution to secure a tight seam the joined edges 20 may be suitably sweated or soldered together.

- In the modification of our invention shown in Figs. 3 and 6, the ends 23 of the corrugations 16 are beveled orappro iimately. of triangular shape. In the mod1fication indicated in Fig. 7 "the seam 25 is offset to one side but this" is, merely intended to illustrate another way of securing the -best practical results. In the modification illustrated in Figs. 11 and 12 the cooling tube or tubes are made up of two pieces of metal-26 and '27, having corrugations which when thetwo pieces of metal are .joined together by the front and back seams'28' form a continuous passage 29. Infthe preferred form of. our invention the corrugations 16 blank 15.

are struck up from the single sheet metal Then] this corrugated sheet is folded over centrally and upon itself, and when-thefree edges 20 thereofare 'interlocked andsui'tably united to make a tight joint the corrugations 16" are brought-into parallelisnrwith each other to form a con tinuous passage as indicated at 29, Figs. 1, L and 11. It will be seen that the edges of the folded metal sheet will form an ex tended vertical stiffening and cutting flange 30 which has the natural tendency to p 1'o-' mote a. constant circulation of air through the straight horizontal open passages between the sides of the adjacent'tubes without, in any way diminishing the normal water circulating space formed by the sides of the tubes.

.l hecrimps, or .chain folds 19 can beflattened out if so desired, as shown at 32,

Figs. 1, 2 and 3.

" ,--It is obvious that a-cooling tube or tubes constructed in accordance with our mven edge of the tube.

'tion combine all the essential conditions for providing instantaneous equalization of temperatures, strength, stiffness and rigidity, capacity to resist internal pressure or external compression or tensional strains, tight joints, and economy and simplicity of manufacture.

Having described our invention, what we desire to secure by Letters Patent and claim is 1. A radiator cooling tube composed of an internal circulatory passage transversely to said corrugations, the latter be ing arranged parallel to the external circulation around said tube and having a "tight seamed stiffening flange pe'rpendicularly normal thereto.

2. A radiator cooling tube composed of angularcorrugations disposed so as to form a circulatory passage transversely to said corrugations, said tube being formed of a single sheet of metal folded over upon itself and having its free edges interlocked and I soldered together.

3. A radiator cooling tube composed of oppositely disposed angular corrugations formed; of a single sheet of metal, diagonal deflections extending across a median line through said sheet and between said corrugations and interlocking joints at the free ends of said metal sheet.

- 4. A radiator cooling tube composed of oppositely disposed angular corrugations formed of'a single s'heet-of'metal, crimps or chain folds between said corrugations at one end thereof, and interlockingjpints at-the other end of said corrugationsf 5. A radiator cooling tube composed of oppositely disposed angular corrugations formed of a single sheet of metal, said corrugations terminating in bevel ends and means uniting the free ends of said metal sheet on .a straight flanged edge.

'6. A radiator cooling tube made of sheet angular corrugations disposed so as to form metal having parallel corrugations on opposlte sides forming together a circulatory passage transverse to said corrugations,.the ends of the corrugations being pointed, stop: .ping short'of the ends of the tube, and offset with relation to oneanother on their re spective sides.

. 7. A radiator :cooling'tube made from a single sheet of metal, comprising oppositely disposed corrugations afl ording' between them a circulatory passage transverse to the same, a seam at one edge of the tube uniting the metal beyond its corrugations, and a. crimped flattened out 8 A radiator cooling tube having corrugat ons arranged in "parallel lines on opposite sides thereof and forming an open pas sagcway transverse to the same, the said.

corrugations terminating short of one edge flange at the other of the tube, and a stiffening flange constituting thesaid edge, which is normally disposed to the longitudinal axes of the corrugations in a median plane passing therebetween.

9. A radiator cooling tube including cor rugated' sides, the corrugations in one side thereof having their innermost angles oposite the inner hollows of the corrugations 1n the other side of the same, a transverse circuitous passageway between said corru gations being thereby formed, and a straight flange closing the tube beyond the corrugations at one edge, said flange being normal to the ends of the corrugations and oflset to one side, substantially as shown.

10. A. radiator tube composed of separate sheets of metal similarly corrugated short of both ends, one sheet being superimposed upon the other so that the corrugations will be offset relatively to one another on opposite sides 01 the tube and a circuitous pas sageway will be formed transverse to the corrugations, one end of each sheet asping the opposite end of the companion'sfieet, and forming therewith a tight seam, at each edge of the tube, the arrangement being such that the tube is provided with stifi'en' ing flanges normal to the ends of the corrugations at both its edges.

Signed. at the borough of Manhattan in the county of New York and State of New York this 11th day of April A. D. 1910.

EMIL BEHRINGER. HERMAN BEHRING-ER. l/Vitnesses:

H. C. KARLsoN, ELEANOR T. MINOGUE. 

